Film-holding spool.



Patented June 4, 1918..

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FELM HOLDING SPOOL. APPLICATION FILED SEPT, 11, 1-917.

ffiicvfmmma/msaw S MM RICHARD JOHNSON, OF IIEOCTOR, VERMONT.

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Specification of Letters latent.

Patented June at, rate,

Application filed September 17, 1917. Serial No. 191,762.

reduce the cost of manufacture of film holding spools to minimum and to so construct the same as to render them exceedingly strong and durable and simplify the construction materially, allowing the film strips to be freely wound and unwound therefrom.

Improvements in the details and arrangement of parts will be apparent from inspec-' tion of the accompanying'drawings, in connection with the specific descri tion hereinafter contained, and wherein t 0 preferred embodiment of the invention is disclosed for thepurpose of imparting a full understandin of the same.

n the drawings; s Figure 1 is a vertical lon 'tudinal section through the improved spoo Fig. 2 is an end elevation of the same; an Fig. 3 is detail in perspective of one of the barbed bracing elements.

Having more particular reference to the drawings wherein like reference characters refer to correspondingparts throughout the several views,'1 represents the wooden core of the s 001, the same being provided with the usuad slot whereby one end of the film strip may be secured to the same. The op-.

posite ends of thecore 1 are reduced as' at 2 in order that circular end pieces 3 formed of cardboard, asteboard or other suitable material provi ed with concentrically arranged openings may be positioned thereover. In this connection, it is to be understood that the diameters of the end pieces 3 may be varied to accord to difierent size film strips, such as conditions or preference may dictate. (I

As means for securing the circular end pieces to the core 1, I provide metal barbed bracing elements designated in their entireties by the numeral 4, the said elements comprising single pieces of metal having the ends thereof bent at substantially right angles and provided with barbs 5, it being noted that the inner barbs are so arranged considerable saving and as 'to permit thesembedding of the same in the adjacent portions of the spool core 1, by driving or forcing the same thereinto, while the outer barbs are embedded in the circular end pieces 3 and firmly clamped thereto,

by upsetting or bending the same against the inner sides of said and pieces to prevent undue displacement thereof. It will be appreciated, that by providing the elements 4, the circular end pieces 3 will not only be braced in order that the film strip wound about the core 1 will be properly positioned, but also they will serve as means for securely positioning the said circular end strips upon their opposite reduced ends of the core.

It is of course to be understood that the usual openings and slots are forined in the cores 1, used in conjunction with the manufacture of my improved spool in order that the same may properly arranged in a camera and rotated, as desired.

It is well known in the art that the conventional construction of film holding spools include metallic end pieces, which end pieces are secured in various ways to the opposite ends of a wooden core 1, rendering the manufactureof the same somewhat expensive. Therefore, by eliminating the use of metallic and pieces and providing end pieces which are formed of cardboard, paste board or other suitable cheap material and bracing the same so as to render them substantially rigid, the cost of manufacture of the film spools is materially reduced, thus edecting yet, not detracting from the efficiency of the 001 in any way.

nifestly, the construction shown is capable of considerable modification and such modification as is within the scope of my claims, I consider within the spirit of my invention.

, I claim:

A film spool including a core, circular and pieces formed of paper or other suitablematerial arranged on the opposite end extremities of said core, bracing elements having barbed ends arranged diametrically of the end pieces, each element having a barb engaged in the and pieces and a barb engaged in the core, the barb engaged in the end pieces being upset against the inner side of the same.

In testimony whereof, I a my signature hereto. a 

